/*
Copyright 2010 Selenium committers

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
 */


package org.openqa.selenium.internal.seleniumemulation;

import com.thoughtworks.selenium.Wait;

import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;

public class WaitForCondition extends SeleneseCommand<Void> {

  private final ScriptMutator mutator;

  public WaitForCondition(ScriptMutator mutator) {
    this.mutator = mutator;
  }

  @Override
  protected Void handleSeleneseCommand(final WebDriver driver, String script,
      final String timeout) {
    StringBuilder builder = new StringBuilder();
    mutator.mutate(script, builder);
    final String modified = builder.toString();

    new Wait() {
      @Override
      public boolean until() {
        Object result = ((JavascriptExecutor) driver).executeScript(modified);

        // Although the conditions should return a boolean, JS has a loose
        // definition of "true" Try and meet that definition.
        if (result == null) {
          return false;
        } else if (result instanceof String) {
          return !"".equals(result);
        } else if (result instanceof Boolean) {
          return (Boolean) result;
        } else {
          return true;
        }
      }
    }.wait("Failed to resolve " + script, Long.valueOf(timeout));

    return null;
  }
}
